摘要
江苏省句容县铜山红柱石矿床,矿体赋存在二叠系堰桥组、龙潭组上段角岩化地层中。矿石中主要矿物成分为石英、粘土矿物、炭质、白云岩、黑云母、长石、红柱石,少量及微量矿物有褐铁矿、赤铁矿、黄铁矿、电气石、石榴石、金红石、锆石、方解石等。矿石中主要矿物的比重十分相近。
The major minerals in Tongshan-based andalusite deposit include andalusite,quartz,clay miner- als,muscovite,biolite and feldspar which possesses similar specific gravity.The andalusite is fine-grained, so the normal heavy concentration can not get satisfied results in gathering andalusite,Additionally.there are other ore-bearing minerals besides andalusite so that it is difficult to quantitatively analyse andalusite by the chemical and phase analyses.Because the andalusite belongs to the neso-silicate minerals which is diffi- cult to dissolve in fluorhydric acid while quartz or other minerals can easily dissolved in the acid,the authors adopt the fluorhydric acid cold-soluble and oil-impregnated methods i.e.to dissolve the most of lyotropic minerals by fluorhydric acid and concentrate andalusite,then to use the oil-impregnated or weight method to measure the content of andalusite quantitatively.The measuring accuracy,reappearance,working speed of new method are higher or better than that of the panning method and the operation step of the former is more simple and easier than latter one.
出处
《江苏地质》
1992年第2期119-121,共3页
Jiangsu Geology
